Why: The US National Security Agency's recently revealed internet surveillance program PRISM has been broadly condemned by tech companies, even those whose networks were allegedly involved. But now some organizations and companies are going further, sending a letter to Congress today calling upon lawmakers to immediately halt PRISM and other forms of internet surveillance. Mozilla, Reddit, 4chan, the ACLU and the Electronic Frontier Foundation are among the 86 different organizations that have co-signed the letter, and they have also launched a new campaign online, "StopWatching.us," which invites web users to add their signatures to the petition as well. [ The Verge ]